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      01-05-2013, 08:11 PM   #22
Tee-Dub's Avatar
Drives: 2008 135i
Join Date: May 2009
Location: Vancouver, WA

Posts: 753
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Originally Posted by SfValley335i View Post
Think about what you just said....

cats in the dp would burn everything off without the secondary cats getting plugged. So whats preventing the cats in the dp from plugging up? haha

Ya, what you read somewhere was wrong.
Because the primary cats get hotter due to their placement, so they would be more efficient?

Anyway, enough of me trying to explain myself and you talking to me like I'm 3 years old. I got it, they wont get plugged. But, I don't see the point of keeping the secondary cats if you go to the time and expense to install downpipes.
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